Car-ventilator.



Patented Apr. 8, I902. E. ANDERSON. CAR VENTILATOR.

(Application fllld Sept. 26, 1901.

(No Model.)

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Unrrnn Sterne ATET rricn EMANUEL ANDERSON, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO AMOS L. \VOOD, OF BOSTON, MASSACHUSETTS.

CAR-VENTILATO R.

SPECIFICATION forming part of Letters Patent No. 697,125, dated April 8, 1902.

Application filed September 26, 1901. Serial No. 76.596. (No model) To all whom it Wuty concern:

Be it known that I, EMANUEL ANDERSON, a citizen of the United States, residing at Somerville, in the county of Suffolk and State of Massachusetts, have invented an Improvement in Oar-Ventilators, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

My invention is an improvement in ventilators, being particularly adapted to the ventilation of cars, and it relates to that type of ventilator in which a draft of outside air acts on the suction principle to withdraw the foul air out through the ventilator, this being somewhat on the principle of the ordinary steaminjector.

Railway-cars and street-cars ordinarily run to and fro without reversal, and, moreover, are liable to be backed up for a short distance at any moment, and for this reason, as well as for other reasons, it is impractical to have rotary ventilators, and especially to have ventilators whose direction is controlled by a wind device, such as a weather-vane, because unless such a ventilator is properly readjusted the instant the cars direction of motion is reversed the ventilator will pour smoke, cinders, and dust into the car instead of removing foul air therefrom, and also such ventilators are apt to be noisy, often get wedged or fixed so as not to be rotatable, &c., and accordingly I have invented the hereinafter-described device, in which the ventilator is fixed or stationary in position on the car and contains a double-ended construction, permitting it to operate with equal facility in whichever direction the car may be running.

The constructional details and further advantages of my invention will be pointed out more fully in the course of the following description, reference being had to the accompanying drawing, in which I have shown a longitudinal sectional view of one embodiment of my invention.

The ventilator may be applied to the side or the top or any other portion of the car found convenient, and the fastening means may be of any approved kind, and accordingly I have confined myself in this description and the drawing to that portion of the ventilator which projects outside of the car.

As herein shown, the ventilator comprises a thimble or neck portion a and a part b, arranged at right angles to the part a. The external portion 1) comprises opposite hoods 1) b having flaring or conical-shaped mouths capable'of gathering in the air and creating a powerful suction in cooperation with a double-ended outlet-drum c. This drum is provided at each end with a deflector c, preferably conical, as shown, and projecting slightly at 0 beyond the adjacent edges of the drum 0, so as to tend to create a vacuum for exhausting the air and aiding in forcibly withdrawing the foul air and gases from the drum and pipe a. The drum 0 is preferably cylindrical and is provided with coarse perforations for permitting free passage of the air, and yet prevent the lodgment of leaves, cinders, or other foreign matter which might be caught by the open ends (7 W.

In operation we well suppose that the car is moving in the direction of the arrow 1, in which case the air will be caught by the mouth I) and a forcible draft or suction will take place in the direction of arrow 2, the air rushing through the part b from the mouth I) to the exit 19 being compelled by reason of the central depression or reverse-cone shape at a, to act forcibly against the foraminous surface of the drum 0' and create a powerful exhaust effect, the air being deflected by the cone 0 and caused by the projecting portion 0 thereof to impinge against the adjacent wall of the part I), being deflected in turn thereby toward the drum, the result being that a vacuum or a tendency to a vacuum is created in that portion of the drum 0 immediately beneath the projecting part 0 The aboveunentioned operation creates a powerful and positive withdrawal of gases through the pipe a in the direction of the arrow 3. Upon a reversal of the direction of travel of the car the same operation takes place automatically in the ventilator, excepting in a reverse direction, the air entering in the direction of the arrow 1 and serving to pull out the foul gases from the drum 0 and pipe a in the direction opposite to the arrow 4;

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It will be understood that I do not limit my invention inall respects to the constructional details herein explained, as many modifications in arrangement and combination of parts may be resorted'to within the spirit and scope of my invention.

I am aware that it is not new tohave a' raminous cylinder providingoutlets for the gases and closed at each end by a pointed deflector.

2. A ventilator of the kind described comprising an outlet-pipe provided atits ends with a double-ended hood open from end to end and containing a drum provided peripherally with outlets for the gases, and said drum having at its opposite end conical deflectors, said deflectors projecting beyond the surface of said drum' at their edges.

3. A ventilator of the kind described comprising an outlet-pipe provided at its end with a double-ended hood open from end to end and containing a drum having sides of f0- raminous material permitting the escape of gases but preventing entrance of leaves, &c.,

vand having itsends closed.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EMANUEL ANDERSON.

Witnesses:

GEO. H. MAXWELL, AMos L. W001). 

